﻿// Copyright (c) 2009, James Killick
// http://code.google.com/p/kosher/
// All rights reserved.

// Redistribution and use in source and binary forms, with or without 
// modification, are permitted provided that the following conditions are met:

//     * Redistributions of source code must retain the above copyright notice, 
//       this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above copyright notice,
//       this list of conditions and the following disclaimer in the documentation
//       and/or other materials provided with the distribution.
//     * Neither the name of the Kosher team nor the names of its contributors may 
//       be used to endorse or promote products derived from this software without 
//       specific prior written permission.

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE 
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

using System;
using System.Text.RegularExpressions;

namespace Kosher.TestHarness.Domain.Validation
{
    public class UserValidatorWithComplexErrors : ValidatorWithComplexErrors<User>
    {
        struct ErrorCodes
        {
            public const int Id = 1001;
            public const int Forename = 1002;
            public const int Surname = 1003;
            public const int Dob = 1004;
            public const int EmailAddress = 1005;
            public const int PostalAddress = 1006;
        }

        public UserValidatorWithComplexErrors()
        {
            AssertFor(u => u.Id)
                .IsTrue(id => id.HasValue).Otherwise(new ComplexError() { ErrorCode = ErrorCodes.Id, ErrorString = "User Id must be set" });

            AssertFor(u => u.Forename)
                .IsTrue(f => !string.IsNullOrEmpty(f)).Otherwise(new ComplexError() { ErrorCode = ErrorCodes.Forename, ErrorString = "Forename must be set" })
                .IsTrue(f => f.Length <= 100).Otherwise(new ComplexError() { ErrorCode = ErrorCodes.Forename, ErrorString = "Forename cannot be greater than 100 characters long" });

            AssertFor(u => u.Surname)
                .IsTrue(s => !string.IsNullOrEmpty(s)).Otherwise(new ComplexError() { ErrorCode = ErrorCodes.Surname, ErrorString = "Surname must be set" })
                .IsTrue(s => s.Length <= 100).Otherwise(new ComplexError() { ErrorCode = ErrorCodes.Surname, ErrorString = "Surname cannot be greater than 100 characters long" });

            AssertFor(u => u.Forename + u.Surname)
                .IsTrue(s => !string.IsNullOrEmpty(s)).Otherwise(new ComplexError() { ErrorCode = ErrorCodes.Forename, ErrorString = "arg" });


            AssertFor(u => u.DateOfBirth)
                .IsTrue(dob => dob.HasValue).Otherwise(new ComplexError() { ErrorCode = ErrorCodes.Dob, ErrorString = "Date of birth must be set" })
// ReSharper disable PossibleInvalidOperationException
                .IsTrue(dob => dob.Value.Year > 1890)
                .IsTrue(dob => dob.Value < DateTime.Now).Otherwise(new ComplexError() { ErrorCode = ErrorCodes.Dob, ErrorString = "Be realistic about your date of birth" });
// ReSharper restore PossibleInvalidOperationException
           
            // Optional field, but when set must match the pattern
            AssertFor(u => u.EmailAddress)
                .IsTrue(email =>
                {
                    if (!string.IsNullOrEmpty(email))
                    {
                        return Regex.IsMatch(email, @"^(?:[a-zA-Z0-9_'^&/+-])+(?:\.(?:[a-zA-Z0-9_'^&/+-])+)*@(?:(?:\[?(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?))\.){3}(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\]?)|(?:[a-zA-Z0-9-]+\.)+(?:[a-zA-Z]){2,}\.?)$");
                    }
                    return true;
                }).Otherwise(new ComplexError() { ErrorCode = ErrorCodes.EmailAddress, ErrorString = "Not a valid email address" });

            // Complex object that has its own validator
            var postalAddressValidator = new PostalAddressValidatorWithComplexErrors();
            AssertFor(u => u.PostalAddress)
                .IsTrue(addr => addr != null).Otherwise(new ComplexError() { ErrorCode = ErrorCodes.PostalAddress, ErrorString = "Postal address not specified" })
                .IsTrue(addr => postalAddressValidator.IsValid(addr)).Otherwise(() => postalAddressValidator.Errors);
        }
    }
}
